I've used this mountain biking downhill about twice. However, I wore it over an undershirt, so I didn't wear it directly on my skin. I washed it each time. The last time I used it was about three years ago, and it has been stored in a dark place since then. It's a size S, but I'll copy and paste the size chart I found online. Please refrain from purchasing if you are overly concerned about details. I don't smoke. Thank you for your consideration.